BUF16820 Datasheet | Burr-Brown

FEATURES D D D D D D D D D D D .. APPLICATIONS 14-CHANNEL GAMMA CORRECTION 2 V OUTPUTS ON-CHIP OTP MEMORY 10-BIT RESOLUTION RAIL-TO-RAIL OUTPUT LOW SUPPLY CURRENT: 1m A/ch SUPPLY VOLTAGE: 8.5V to 18V DIGITAL SUPPLY: 2.0V to 5.5V INDUSTRY-STANDARD, TWO-WIRE INTERFACE: 3.4MHz HIGH-SPEED MODE HIGH ESD RATING: 4k V HBM, 1k V CDM, 200V MM DEMO BOARD AND SOFTWARE AVAILABLE D REPLACES RESISTOR-BASED GAMMA SOLUTIONS TFT-LCD REFERENCE DRIVERS DYNAMIC GAMMA CONTROL DESCRIPTION The BUF16820 is a programmable voltage reference generator designed for gamma correction in TFT-LCD panels. It provides 14 programmable outputs and two V channels, each with 10-bit resolution. It offers on-chip, one-time programmable (OTP) memory that allows the user to store the gamma voltages on-chip. This eliminates the need for an external EEPROM. This programmability replaces the traditional, timeconsuming process of changing resistor values to optimize the various gamma voltages, and allows designers to determine the correct gamma voltages for a panel very quickly. Required voltage changes can also be easily implemented without changing the hardware. The BUF16820 uses TI’s latest, small-geometry analog CMOS process, which makes it a very petitive choice for full production, not just evaluation. Programming of each output occurs through an industrystandard, two-wire serial interface. Unlike existing programmable buffers, the BUF16820 offers a high-speed mode that allows clock speeds up to 3.4MHz. For devices with a lower or higher channel count, please contact your local sales or marketing representative. 2V to 5.5V Digital BUF16820 8.5V to 18V Analog REFH REFH OUT OUT1 OUT2 … … DAC Registers 1 OTP Memory DAC Registers 2 … 14 Output Channels plus Two V Channels Program mand OUT13 OUT14 The BUF16820 is available in an HTSSOP-32 Power PAD package. It is specified from - 40°C to +85°C. V1 BUF16820 RELATED PRODUCTS FEATURES 18-Channel Programmable, Two V Channels, Memory 12-Channel...